Construction: Aluminum/Steel

but it does produce the best power to weight ratio as well as offering the best cooling effect possible from the case

along with the fully adjustable chin strap system

New GEN3 Integrated Auto Locking Quick Release Mount

Vism M-LOK® FOLDABLE FOREGRIP/ BLACK Classic Army Construction: Aluminum/SteelLockable 2 positions foldable foregrip with non slip rubberized texturing. Foregrip can be folded and locked into a 90 vertical or 180 horizontal positions. Foregrip mounts onto M LOK slots of a handguard. Designed to be grasped by the support hand for better support and pointability. Aids in the maneuverability of the firearms. Made of rubberized over molded high quality polymer. All mounting hardware included.